Climate Insights for Rio do Sul

The climate in Rio do Sul is warm and mild. The average annual temperature is 18°C and approximately 1466mm of precipitation falls per year. Rio do Sul receives a notable amount of rainfall throughout the year, including during its driest month. Rio do Sul is in the Southern Hemisphere. The seasons are reversed: summer runs from December to February, while winter falls between June and August. The summer months are: February, January, December. The coldest months are July, June, August, when temperatures can drop to 9°C.

Rio do Sul sees moderate temperature variation throughout the year, ranging from 9°C to 28°C. The warmest month is February, when average highs reach 28°C and the mean temperature sits around 23°C. July is the coolest month, with minimum temperatures around 9°C and an average of 13°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 3°C shift in average temperatures.

Rio do Sul is a fairly wet location, receiving approximately 1466mm of precipitation annually, which averages out to around 122mm per month. The wettest month is December, averaging 172mm of rainfall. January and October also tend to see above-average precipitation. The driest month is July, with just 73mm. That's 100mm less than December, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.

Rio do Sul is relatively calm, with an average annual wind speed of 6km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is November, averaging 7km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 5km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.

It is currently winter in Rio do Sul, which began on June 21, 2026. Rio do Sul is in the Southern Hemisphere, where the seasons are reversed: spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in February at around 28°C, while the coldest stretch bottoms out in July near 9°C. Spring is next, beginning on September 23, 2026 (3 days from now).

The best time to visit Rio do Sul is during April, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 90mm per month. By contrast, February can be uncomfortably hot with highs reaching 28°C, while July is the coldest period with lows dropping to 9°C. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Rio do Sul based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.